I. ˈnāˌsā noun
Etymology: nay (I) + say, n.; after the phrase to say one nay
: refusal , denial
II. (ˈ) ̷ ̷| ̷ ̷ transitive verb
Etymology: nay (I) + say, vb.
: deny , refuse , oppose
there might have been … for anything he could naysay — W.F.DeMorgan
• naysayer (ˈ) ̷ ̷| ̷ ̷ ̷ ̷ noun -s